package com.kazares.servlet;

import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 *
 * @author Windows
 */
@WebServlet(name = "JsonCRUD", urlPatterns = {"/JsonCRUD"})
public class JsonCRUD extends HttpServlet {

    /**
     * Processes requests for both HTTP
     * <code>GET</code> and
     * <code>POST</code> methods.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        try {
            String crud = request.getParameter("crud");
            if (crud != null) {
                if (crud.equalsIgnoreCase("create")) {
                    out.write(create(request));
                } else if (crud.equalsIgnoreCase("read")) {
                    out.write(read(request));
                } else if (crud.equalsIgnoreCase("update")) {
                    out.write(update(request));
                } else if (crud.equalsIgnoreCase("delete")) {
                    out.write(delete(request));
                } else {
                    //msg crud invalid
                }
            } else {
                //msg crud null
            }

        } finally {
            out.close();
        }
    }

    private String create(HttpServletRequest request) {
        //crear DTO
        //validar campos DTO
        //guardar datos
        //retornar mensaje
        return "";
    }

    private String read(HttpServletRequest request) {
        return "";
    }

    private String update(HttpServletRequest request) {
        return "";
    }

    private String delete(HttpServletRequest request) {
        return "";
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP
     * <code>GET</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Handles the HTTP
     * <code>POST</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Returns a short description of the servlet.
     *
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
